// Source File Name:   ObjectUtils.java

package com.iava.utils;

import java.lang.reflect.Array;
import java.util.Arrays;

public abstract class ObjectUtils {

	public ObjectUtils() {
	}

	public static boolean isCheckedException(Throwable ex) {
		return !(ex instanceof RuntimeException) && !(ex instanceof Error);
	}

	public static boolean isCompatibleWithThrowsClause(Throwable ex,
			Class declaredExceptions[]) {
		if (!isCheckedException(ex))
			return true;
		if (declaredExceptions != null) {
			for (int i = 0; i < declaredExceptions.length; i++)
				if (declaredExceptions[i].isAssignableFrom(ex.getClass()))
					return true;

		}
		return false;
	}

	public static boolean isEmpty(Object array[]) {
		return array == null || array.length == 0;
	}

	public static Object[] addObjectToArray(Object array[], Object obj) {
		Class compType = java.lang.Object.class;
		if (array != null)
			compType = ((Object) (array)).getClass().getComponentType();
		else if (obj != null)
			compType = obj.getClass();
		int newArrLength = array == null ? 1 : array.length + 1;
		Object newArr[] = (Object[]) Array.newInstance(compType, newArrLength);
		if (array != null)
			System.arraycopy(((Object) (array)), 0, ((Object) (newArr)), 0,
					array.length);
		newArr[newArr.length - 1] = obj;
		return newArr;
	}

	public static Object[] toObjectArray(Object source) {
		if (source instanceof Object[])
			return (Object[]) source;
		if (source == null)
			return new Object[0];
		if (!source.getClass().isArray())
			throw new IllegalArgumentException((new StringBuilder(
					"Source is not an array: ")).append(source).toString());
		int length = Array.getLength(source);
		if (length == 0)
			return new Object[0];
		Class wrapperType = Array.get(source, 0).getClass();
		Object newArray[] = (Object[]) Array.newInstance(wrapperType, length);
		for (int i = 0; i < length; i++)
			newArray[i] = Array.get(source, i);

		return newArray;
	}

	public static boolean nullSafeEquals(Object o1, Object o2) {
		if (o1 == o2)
			return true;
		if (o1 == null || o2 == null)
			return false;
		if (o1.equals(o2))
			return true;
		if ((o1 instanceof Object[]) && (o2 instanceof Object[]))
			return Arrays.equals((Object[]) o1, (Object[]) o2);
		if ((o1 instanceof boolean[]) && (o2 instanceof boolean[]))
			return Arrays.equals((boolean[]) o1, (boolean[]) o2);
		if ((o1 instanceof byte[]) && (o2 instanceof byte[]))
			return Arrays.equals((byte[]) o1, (byte[]) o2);
		if ((o1 instanceof char[]) && (o2 instanceof char[]))
			return Arrays.equals((char[]) o1, (char[]) o2);
		if ((o1 instanceof double[]) && (o2 instanceof double[]))
			return Arrays.equals((double[]) o1, (double[]) o2);
		if ((o1 instanceof float[]) && (o2 instanceof float[]))
			return Arrays.equals((float[]) o1, (float[]) o2);
		if ((o1 instanceof int[]) && (o2 instanceof int[]))
			return Arrays.equals((int[]) o1, (int[]) o2);
		if ((o1 instanceof long[]) && (o2 instanceof long[]))
			return Arrays.equals((long[]) o1, (long[]) o2);
		if ((o1 instanceof short[]) && (o2 instanceof short[]))
			return Arrays.equals((short[]) o1, (short[]) o2);
		else
			return false;
	}

	public static int nullSafeHashCode(Object obj) {
		if (obj == null)
			return 0;
		if (obj instanceof Object[])
			return nullSafeHashCode((Object[]) obj);
		if (obj instanceof boolean[])
			return nullSafeHashCode((boolean[]) obj);
		if (obj instanceof byte[])
			return nullSafeHashCode((byte[]) obj);
		if (obj instanceof char[])
			return nullSafeHashCode((char[]) obj);
		if (obj instanceof double[])
			return nullSafeHashCode((double[]) obj);
		if (obj instanceof float[])
			return nullSafeHashCode((float[]) obj);
		if (obj instanceof int[])
			return nullSafeHashCode((int[]) obj);
		if (obj instanceof long[])
			return nullSafeHashCode((long[]) obj);
		if (obj instanceof short[])
			return nullSafeHashCode((short[]) obj);
		else
			return obj.hashCode();
	}

	public static int nullSafeHashCode(Object array[]) {
		if (array == null)
			return 0;
		int hash = 7;
		int arraySize = array.length;
		for (int i = 0; i < arraySize; i++)
			hash = 31 * hash + nullSafeHashCode(array[i]);

		return hash;
	}

	public static int nullSafeHashCode(boolean array[]) {
		if (array == null)
			return 0;
		int hash = 7;
		int arraySize = array.length;
		for (int i = 0; i < arraySize; i++)
			hash = 31 * hash + hashCode(array[i]);

		return hash;
	}

	public static int nullSafeHashCode(byte array[]) {
		if (array == null)
			return 0;
		int hash = 7;
		int arraySize = array.length;
		for (int i = 0; i < arraySize; i++)
			hash = 31 * hash + array[i];

		return hash;
	}

	public static int nullSafeHashCode(char array[]) {
		if (array == null)
			return 0;
		int hash = 7;
		int arraySize = array.length;
		for (int i = 0; i < arraySize; i++)
			hash = 31 * hash + array[i];

		return hash;
	}

	public static int nullSafeHashCode(double array[]) {
		if (array == null)
			return 0;
		int hash = 7;
		int arraySize = array.length;
		for (int i = 0; i < arraySize; i++)
			hash = 31 * hash + hashCode(array[i]);

		return hash;
	}

	public static int nullSafeHashCode(float array[]) {
		if (array == null)
			return 0;
		int hash = 7;
		int arraySize = array.length;
		for (int i = 0; i < arraySize; i++)
			hash = 31 * hash + hashCode(array[i]);

		return hash;
	}

	public static int nullSafeHashCode(int array[]) {
		if (array == null)
			return 0;
		int hash = 7;
		int arraySize = array.length;
		for (int i = 0; i < arraySize; i++)
			hash = 31 * hash + array[i];

		return hash;
	}

	public static int nullSafeHashCode(long array[]) {
		if (array == null)
			return 0;
		int hash = 7;
		int arraySize = array.length;
		for (int i = 0; i < arraySize; i++)
			hash = 31 * hash + hashCode(array[i]);

		return hash;
	}

	public static int nullSafeHashCode(short array[]) {
		if (array == null)
			return 0;
		int hash = 7;
		int arraySize = array.length;
		for (int i = 0; i < arraySize; i++)
			hash = 31 * hash + array[i];

		return hash;
	}

	public static int hashCode(boolean bool) {
		return bool ? 1231 : '?';
	}

	public static int hashCode(double dbl) {
		long bits = Double.doubleToLongBits(dbl);
		return hashCode(bits);
	}

	public static int hashCode(float flt) {
		return Float.floatToIntBits(flt);
	}

	public static int hashCode(long lng) {
		return (int) (lng ^ lng >>> 32);
	}

	public static String nullSafeToString(Object obj) {
		if (obj == null)
			return "null";
		if (obj instanceof String)
			return (String) obj;
		if (obj instanceof Object[])
			return nullSafeToString((Object[]) obj);
		if (obj instanceof boolean[])
			return nullSafeToString((boolean[]) obj);
		if (obj instanceof byte[])
			return nullSafeToString((byte[]) obj);
		if (obj instanceof char[])
			return nullSafeToString((char[]) obj);
		if (obj instanceof double[])
			return nullSafeToString((double[]) obj);
		if (obj instanceof float[])
			return nullSafeToString((float[]) obj);
		if (obj instanceof int[])
			return nullSafeToString((int[]) obj);
		if (obj instanceof long[])
			return nullSafeToString((long[]) obj);
		if (obj instanceof short[])
			return nullSafeToString((short[]) obj);
		else
			return obj.toString();
	}

	public static String nullSafeToString(Object array[]) {
		if (array == null)
			return "null";
		int length = array.length;
		if (length == 0)
			return "{}";
		StringBuffer buffer = new StringBuffer();
		for (int i = 0; i < length; i++) {
			if (i == 0)
				buffer.append("{");
			else
				buffer.append(", ");
			buffer.append(String.valueOf(array[i]));
		}

		buffer.append("}");
		return buffer.toString();
	}

	public static String nullSafeToString(boolean array[]) {
		if (array == null)
			return "null";
		int length = array.length;
		if (length == 0)
			return "{}";
		StringBuffer buffer = new StringBuffer();
		for (int i = 0; i < length; i++) {
			if (i == 0)
				buffer.append("{");
			else
				buffer.append(", ");
			buffer.append(array[i]);
		}

		buffer.append("}");
		return buffer.toString();
	}

	public static String nullSafeToString(byte array[]) {
		if (array == null)
			return "null";
		int length = array.length;
		if (length == 0)
			return "{}";
		StringBuffer buffer = new StringBuffer();
		for (int i = 0; i < length; i++) {
			if (i == 0)
				buffer.append("{");
			else
				buffer.append(", ");
			buffer.append(array[i]);
		}

		buffer.append("}");
		return buffer.toString();
	}

	public static String nullSafeToString(char array[]) {
		if (array == null)
			return "null";
		int length = array.length;
		if (length == 0)
			return "{}";
		StringBuffer buffer = new StringBuffer();
		for (int i = 0; i < length; i++) {
			if (i == 0)
				buffer.append("{");
			else
				buffer.append(", ");
			buffer.append("'").append(array[i]).append("'");
		}

		buffer.append("}");
		return buffer.toString();
	}

	public static String nullSafeToString(double array[]) {
		if (array == null)
			return "null";
		int length = array.length;
		if (length == 0)
			return "{}";
		StringBuffer buffer = new StringBuffer();
		for (int i = 0; i < length; i++) {
			if (i == 0)
				buffer.append("{");
			else
				buffer.append(", ");
			buffer.append(array[i]);
		}

		buffer.append("}");
		return buffer.toString();
	}

	public static String nullSafeToString(float array[]) {
		if (array == null)
			return "null";
		int length = array.length;
		if (length == 0)
			return "{}";
		StringBuffer buffer = new StringBuffer();
		for (int i = 0; i < length; i++) {
			if (i == 0)
				buffer.append("{");
			else
				buffer.append(", ");
			buffer.append(array[i]);
		}

		buffer.append("}");
		return buffer.toString();
	}

	public static String nullSafeToString(int array[]) {
		if (array == null)
			return "null";
		int length = array.length;
		if (length == 0)
			return "{}";
		StringBuffer buffer = new StringBuffer();
		for (int i = 0; i < length; i++) {
			if (i == 0)
				buffer.append("{");
			else
				buffer.append(", ");
			buffer.append(array[i]);
		}

		buffer.append("}");
		return buffer.toString();
	}

	public static String nullSafeToString(long array[]) {
		if (array == null)
			return "null";
		int length = array.length;
		if (length == 0)
			return "{}";
		StringBuffer buffer = new StringBuffer();
		for (int i = 0; i < length; i++) {
			if (i == 0)
				buffer.append("{");
			else
				buffer.append(", ");
			buffer.append(array[i]);
		}

		buffer.append("}");
		return buffer.toString();
	}

	public static String nullSafeToString(short array[]) {
		if (array == null)
			return "null";
		int length = array.length;
		if (length == 0)
			return "{}";
		StringBuffer buffer = new StringBuffer();
		for (int i = 0; i < length; i++) {
			if (i == 0)
				buffer.append("{");
			else
				buffer.append(", ");
			buffer.append(array[i]);
		}

		buffer.append("}");
		return buffer.toString();
	}

	public static String identityToString(Object obj) {
		if (obj == null)
			return "";
		else
			return (new StringBuilder(String.valueOf(obj.getClass().getName())))
					.append("@").append(getIdentityHexString(obj)).toString();
	}

	public static String getIdentityHexString(Object obj) {
		return Integer.toHexString(System.identityHashCode(obj));
	}

	public static String getDisplayString(Object obj) {
		if (obj == null)
			return "";
		else
			return nullSafeToString(obj);
	}

	private static final int INITIAL_HASH = 7;
	private static final int MULTIPLIER = 31;
	private static final String EMPTY_STRING = "";
	private static final String NULL_STRING = "null";
	private static final String ARRAY_START = "{";
	private static final String ARRAY_END = "}";
	private static final String EMPTY_ARRAY = "{}";
	private static final String ARRAY_ELEMENT_SEPARATOR = ", ";
}
